Home / 28,438.07-39,244.27-15,691.37

Finding the Fourth Proportional to 28,438.07, 39,244.27 and 15,691.37

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Solution

The fourth proportional to 28,438.07, 39,244.27 and 15,691.37 is: 21,653.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.07 : 39,244.27 = 15,691.37 : x
  2. Step 2: Convert to fraction form
    28,438.07/39,244.27 = 15,691.37/x
  3. Step 3: Cross multiply
    28,438.07x = 39,244.27 × 15,691.37
  4. Step 4: Simplify right side
    28,438.07x = 615,796,360.95
  5. Step 5: Solve for x
    x = 615,796,360.95/28,438.07
  6. Step 6: Final answer
    x = 21,653.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.